@INCOLLECTION\{IMM1987-01568,
    author       = "F. Nielson",
    title        = "Towards a Denotational Theory of  Abstract Interpretation",
    year         = "1987",
    pages        = "219-245",
    booktitle    = "Abstract Interpretation of Declarative Languages",
    volume       = "",
    number       = "",
    series       = "",
    publisher    = "",
    address      = "",
    edition      = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/1568-full.html"
}